Store

http://pastebin.com/1HCRsgC3
import chn.util.*;
import apcslib.*;
import java.util.*;

public class Store{
    private Item[] myStore;
    public Store(String fileName){
        FileInput inFile = new FileInput(fileName);
        int size = inFile.readInt();
        myStore = new Item[size];
        int a = 0;
        while(inFile.hasMoreTokens()){
            int id = inFile.readInt();
            int inv = inFile.readInt();
            myStore[a] = new Item(id, inv);
            a++;
        }
    }
    public void displayStore(){
        int count = 0;
        System.out.println('\t' + "Id" + '\t' + "Inv");
        for(int i = 0; i < myStore.length; i++){
            System.out.println((i+1) + "    " + myStore[i].toString());
            count++;
            if(count == 10){
                System.out.println();
                count = 0;
            }
        }
    }
    public void doSort(){
        quickSort(myStore, 0, myStore.length - 1);
    }
    private void quickSort(Item[] list, int first, int last){
        int g = first, h = last;
        int midIndex = (first + last) / 2;
        Item dividingValue = list[midIndex];
        do{
            while (list[g].compareTo(dividingValue) < 0){
                g++;
            }
            while (list[h].compareTo(dividingValue) > 0){
                h--;
            }
            if (g <= h){
                Item temp = list[g];
                list[g] = list[h];
                list[h] = temp;
                g++;
                h--;
            }
        }
        while (g < h);
        if (h > first){
            quickSort (list,first,h);
        }
        if (g < last){
            quickSort (list,g,last);
        }
    }
    public void testSearch(){
        int idToFind;
        int invReturn;
        int index;
        ConsoleIO console = new ConsoleIO();
        System.out.println("Testing search algorithm\n");
        System.out.print("Enter Id value to search for (-1 to quit) ---> ");
        idToFind = console.readInt();
        while (idToFind >= 0){
            index = bsearch(new Item(idToFind, 0));
            System.out.print("Iterative binary search: Id # " + idToFind);
            if (index == -1)
                System.out.println("     No such part in stock");
            else
                System.out.println("     Inventory = " + myStore[index].getInv());
            index = bsearch (new Item(idToFind, 0), 0, myStore.length-1);
            System.out.print("Recursive binary search: Id # " + idToFind);
            if (index == -1)
                System.out.println("     No such part in stock");
            else
                System.out.println("     Inventory = " + myStore[index].getInv());
            System.out.print("\nEnter Id value to search for (-1 to quit) ---> ");
            idToFind = console.readInt();
        }
    }
    int bsearch(Item idToSearch){
        int first = 0;
        int last = myStore.length - 1;
        while (first <= last){
            int mid = (first + last)/2;
            if (myStore[mid].compareTo(idToSearch) == 0)
                return mid;
            else if (myStore[mid].compareTo(idToSearch) > 0)
                last = mid - 1;
            else first = mid + 1;
        }
        return -1;
    }
    int bsearch (Item idToSearch, int first, int last){
        int mid = (first + last)/2;
        if(first > last)
            return -1;
        else if(myStore[mid].equals(idToSearch))
            return mid;
        else{
            if(myStore[mid].compareTo(idToSearch) > 0){
                return bsearch(idToSearch, first, mid - 1);
            }
            else
                return bsearch(idToSearch, mid + 1, last);
        }
    }

    public static void main(String[] args) {
        Store miniMart = new Store("file50.txt");
        System.out.println("Database before sorted: ");
        System.out.println();
        miniMart.displayStore();
        miniMart.doSort();
        System.out.println();
        System.out.println("Database after sorted by id: ");
        System.out.println();
        miniMart.displayStore();
        miniMart.testSearch();
    }
}